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20 + 60 + 50 + 80 + 90 + 10 + 50 + 60 x 10
= (20 + 80) + (50 + 50 ) + (90 + 10 ) + 600 + 60
= 100 + 100 + 100 + 660
= 960
=(20+80)+(50+50)+(90+10)+(60*10)+60
=100+100+100+600+60
=960
![](https://rs.olm.vn/images/avt/0.png?1311)
x + 50 = 50 + 10
x + 50 = 60
x = 60 -50
x = 10
ai tk mk mk tk lại
![](https://rs.olm.vn/images/avt/0.png?1311)
X + 10 = 50 - 10
X + 10 = 40
X = 40 - 10
X = 30
Ai k mk mk k lại
![](https://rs.olm.vn/images/avt/0.png?1311)
![](https://rs.olm.vn/images/avt/0.png?1311)
Z x 100 = 50 x 10
Z x 100 = 500
Z = 500 : 100
Z = 5
Chúc bạn may mắn
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a) 450 – ( 25 – 10) = 450 – 15
= 435
450 – 25 – 10 = 425 – 10
= 415
b) 180 : 6 : 2 = 30 : 6
= 15
180 : ( 6 : 2 ) = 180 : 3
= 60
c) 410 – (50 +30) = 410 -80
= 330
410 - 50 + 30 = 360 + 30
= 390
d) 16 x (6 : 3) = 16 x 2
= 32
16 x 6 : 3 = 96 : 3
= 32
![](https://rs.olm.vn/images/avt/0.png?1311)
a)x+400=500-100
x+400=400
x=400-400
x=0
b)x+10=50
x=50-10
x=40
x + 400 = 500 - 100
x + 400 = 400
x = 400 - 400
x = 0
x + 10 = 50
x = 50 -10
x = 40
x +50 = 50 x 10
x + 50 = 500
x = 500 -50
x = 450
\(x+50=50\times10\)
\(x+50=500\)
\(x=500-50\)
\(x=450\)